Added ios linking code

ios/Campus/AppDelegate.m

@@ -14,10 +14,20 @@
 #import <UMReactNativeAdapter/UMNativeModulesProxy.h>
 #import <UMReactNativeAdapter/UMModuleRegistryAdapter.h>
 
+#import <React/RCTLinkingManager.h>
+
 @implementation AppDelegate
 
 @synthesize window = _window;
 
+- (BOOL)application:(UIApplication *)application
+   openURL:(NSURL *)url
+   options:(NSDictionary<UIApplicationOpenURLOptionsKey,id> *)options
+{
+  return [RCTLinkingManager application:application openURL:url options:options];
+}
+
+
 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
 {
   self.moduleRegistryAdapter = [[UMModuleRegistryAdapter alloc] initWithModuleRegistryProvider:[[UMModuleRegistryProvider alloc] init]];